### Eclipse Workspace Patch 1.0
#P moodle
Index: lib/blocklib.php
===================================================================
RCS file: /cvsroot/moodle/moodle/lib/blocklib.php,v
retrieving revision 1.185
diff -u -r1.185 blocklib.php
--- lib/blocklib.php	12 Jun 2009 11:58:12 -0000	1.185
+++ lib/blocklib.php	24 Jun 2009 17:50:38 -0000
@@ -1253,6 +1253,9 @@
             $region = $page->blocks->get_default_region();
             $weight = $DB->get_field_sql("SELECT MAX(defaultweight) FROM {block_instances} 
                     WHERE contextid = ? AND defaultregion = ?", array($page->context->id, $region));
+            if (is_null($weight)) {
+                $weight = 0; 
+            }
             $pagetypepattern = $page->pagetype;
             if (strpos($pagetypepattern, 'course-view') === 0) {
                 $pagetypepattern = 'course-view-*';